You can use irony or understatement. Say something but mean the opposite, or make a situation seem less important than it really is.
To write sarcasm well in fiction, you need to master the art of tone and word choice. Use irony and understatement to convey the opposite of what's being said.
One way to express weight is by using vivid adjectives and descriptive language. Talk about how heavy an object feels or looks. Also, compare it to something familiar to give the reader a better sense of its weight.
One way is to describe the character's inner thoughts and emotions. Let the readers understand the depth of their hatred. Also, show how it affects their relationships and decisions.
One way is to incorporate time markers like dates, hours, or specific time periods. Also, you could show the passage of time through character development and changes in the setting.
Satire was a literary technique that achieved the purpose of satire by revealing the negative phenomena in society or the weaknesses of human nature to arouse the readers 'resonance and vigilance. In a novel, irony could be used to reveal the shortcomings of a character and criticize social reality to enhance the appeal and persuasiveness of the work. At the same time, irony is also an important narrative skill. It can create a tense atmosphere through the use of language, promote the development of the plot, shape the character image, and enhance the artistic effect of the work.
You could also compare the weight of one thing to another. Like, 'The suitcase was twice as heavy as the backpack.' That helps the reader understand the relative weight.
You can use descriptive words and onomatopoeia. For example, 'The thunder boomed loudly' or 'The cat meowed softly'.